my question is how much space does xp take up when i use parallels to install it? is it more or less than bootcamp. i'm thinking parallels will be a better option for me because i can run them at the same time. also how fast will xp run? is there quite a bit of lag? i'm thinking if i do parallels that i want to install Ubuntu (just to mess with) and XP (for those times i need to run windows only stuff), but i really don't want to take up huge amounts of space. any info on parallels i'm sure will be helpful. thanks.